SJ501 is a kind of aluminum-titanium-type sintered flux&comma;BW&equals;0&period;5-0&period;8&comma;mesh 10-40&lpar;2&period;0-0&period;45mm&rpar;&comma;Either alternating or direct current can be used&period;It has hight rust resis-tance and the sag is easy to drop after welding&period; The welding bead is smooth and the welding technology has good performance&period;Usage&colon;When applied to various welding wires such as H08A&comma;H08MnA&comma;H08MnMo and H10MnSi&comma;it can weld low-carbon steel&comma;low-alloy steel and pressure vessel steel&period;And it is fit for fast welding of thin steel sheet like gas steel tanks and membrane water-cooled wall in boiler factory&period;Cautions&colon;1&period;The oil soil&comma;moisture&comma;iron rust and other foreign substances must be removed from the welding joint&period;2&period;The welding flux must be baked under 300-350ºC for 2 hours before welding&period;